Lock valve



Feb. 3. 1925.

C. BERARDI LOCK VALVE Fil ed June 30-, 1921 Patented Feb. 3, 1925.

UNITED STATES CARMINE BERARDI, OF, PHILADELPHIA. PENNSYLVANIA.

LOCK

VALVE.

Application tiled June 30, 1921. Serial No. 481,467.

To all whom it may concern Be it known that Canmm: Brnannr, a citizen of the United States, residing at Philadelphia, in the countyof Philadelphia and State of Pennsylvania. has invented certain new and useful Improvements 'in Lock Valves, of which the following is a Specification.

This invention relates to locking valves, and is adapted mainlyfor use in tonnection with the fuel 'feed line or pipe of internal combustion motors; more specifically applicable to the gas line of motor vehicles, whereby the line may be locked when it IS desired to preclude the passa e of fuel thercthrough to the carburetor oFthemotor.

A further object of the -invention is to provide a loekin tion that it may lie readily installedat any desired plaee in the feed pipe of the motor,

and which may be quickly and easily operated by inserting therein a proper key, to either permit the fuel to pass therethrough or to seal the same against such passage.

stillrfurther object 'is to provide a lot valve of simple and inexpensive eonstrm tion, which is compo. ed of butfew simple and readily assemble parts, which-has'its various arts soconstrncted and assembled :io' as to minimize the opportunity for wear,

breakage or derangement, which has its dug so applied that'thh valve can not be iaken a nut without the introduction thereto of the proper key, and which may be manufactured at low cost. V

A still further object is to provide a locking valve of the rotar plug type, and wherein the sanie is w ged upon its seat when in operative position, whereby danger of the same becoming iarred loose from its seat is overcome.

With these'ob'ects in view, together with others'which will appear as the description proceeds. the invention consists in the novel construction, assemblage and arrangement of parts, all as will be described more fully hereinafter, illustrated in the aceom anying drawings, and particularly pointe out in the claims. L

In the drawings:

Fig. 1 is a vertical longitudinal sectional view taken ti tau .1 a valve constructed in 6 pipe lineis closed,

(v valve of such construe Fig. 2 is a top plan view of the improved I valve, and

Fig. 3 is a side elevation, parts broken away, showing the plug in unlocked or open position.

The pipe line of the motor vehicle engine isindicated at 4, and is of the usual well known construction, and leads from the source of fuel supply to the carburetor of the engine. as will be understood.

The v'alve of m invention includes a body or casing in ieated at 5, formed of suitable metal and cast in the desired size and appropriate shape. This body or casing, in' the present instance, iscircular in top plan, and has' a bore 6 o ening centrally in the top thereof an extending nearly to the bottom of the casing. This bore is circular in cross. section for the greater part ofiits depth and the side walls thereof taper inwardly near the bottom of the bore to provide a valve seat. as at 7. The extreme lower end of this opening or boreis of greatly reduced diameter and is interior-1y threaded as" shown; this reduced 1; threaded, portion being confined within the eplargement 8 at the lower end of the c mg;

Afuelpassage or duct 9 passes longitudinally through the casing near the lower part thereofland commimicates with the seat 7. the said seat intercepting the passage so that the latter communicate with the seat at diametrically opposite points therein. The

passage extcnds'upwnnlly from'the seat and communicates with the nipples near the upper end of the casing; these nipples bein Indicated at 10 The nip iles are of suc size that the ends of the broken pipe line may be snugly engaged thereover.

The lockingdevice for the casing includes the rotatable plug 11, of a size and shape corresponding with the bore of the casing. This plug has tapered walls 12 near its lower end to rest and seat upon the seat 7, 100 and the extremelower end of the plug is reduced and threaded. forming a shank 13 to engage in the interiorly threaded recess at the bottom of the casin The construction is such that a tight t of the plug in 105 the bore is obtained, and danger of leakage of the fluid past the pin is obviated.

The tapered portion 0 the plug is provided with a passage 14 adapted when the plug is in open position to aline with the 110 c This precludes leakage offuel in,the casing bore. and the binding actiou'of thechannel or duct 9 of the casing, to permit of fuel passing from one end of the easing to the other. l-Vhen.- however, the plug is turned so that the channels and duct- 9 and 14 respectively are out of alinement, passage of any appreciable quantity of fuel beyond the plug will be prevented, as will be obvious. In rotatingthe plug to closed position, the plug will be slightly withdrawn from the here. that is. the stem or shank 13 will be lifted slightly from the bottom of the threaded recess. whilewhen the valve plug is turned to such position as to permit the passage of fuel therethrough, the shank or stem will tightly seat in thebottom of the threaded recess and will bind therein. Obviously the tapered portion of the plug will seat firmly upon the tapered portion of the bore when the plug is in open position, and will tend to bind upon its seat.

plug prevents the same turning in its bore, as might be the case were it not so bound, due to vibration of the vehicle when in Y motion.

The plugis provided with an axial opening or slot 15 to receive a key for "operating the locking mechanism of the casing. This locking mechanism may be of any preferred construction. the present illustration showing a number of pins 16 carried in the block 17 set in the casing and tightly-fixed therein. These pins are normally projected into the slot of the plug by springs 18. thus holding the plug against rotation. When. however,the proper key is inserted in the slot the pins are forced back out of the slot to free the plug. permitting the plug to be turned to operative position. The upper part of the casing is provided with a spring toiigue to engage in suitable notches'in the plug, holding the latter in either on or "off positions. The spring is indicated at 19 and the notches'therefor at 20.

The casing is applied to the 'fuel line by cutting the pipe 4 and engaging the ends of the latter orcr thc nipples 10. making ti ht joints to prevent leakage. The owner o .lhe vehicle to which the lock casing is applied will be furnished with a key to op-- crate the particular lock combination with which the casing is provided, and .no other ltoynvill operate the. lock. IVhenrit is dc- .sircd to operate the rcbit-le the key is inscrtcd in the plug and the latter rotated a quarter turn so as.to register the openings 14 and 9. In order to do this slight pressure must be applied to the plug. causing the latter to become firmly seated, as before described. and thus held against be coming loose. The fuel will thcn pass to the carbureter as needed. In locking thc fuel line, the key is inserted and the plug rotated back a quarter turn, and upon withdrawal of the key the pins 16 will enter the slot 15 and hold theplug against mo ement.

By constructing the device in the manner described, it is obvious that a safety lock for the fuel line is provided, and one in which tampering by unauthorized peisons will he of no avail. It is possible to gain access to the interior of the casing only with the proper key, and by reason of the fact that the entire lower end of the plug is wholly enclosed by a part of the casing wrenches, screw-drivers and the like cannot be employed successfully to operate the .valve. The block 17 holding the pins 16 may be brazed or in any other manner rigidly aflixed in the casing.

I claim:

1. In a locking valve, a casing, a plug fitting therein, a tapered-seat in said casing, a tapered portion on said plug fitting upon said seat, the said casing-having a threaded recess, ra threaded stem on said plug engaged I in said recess, and the said plug being in one definite position when the said plu has been turned so that the taper thereof is wedged upon said seat and the threaded stem is limited against further rotary movement in one direction.

2. In a lo kingw'alvc. a casing having a bore 'therein.-a seat in said casing llll\'ill; tapered walls. the said bore terminating at one end in a threaded recess alined with said bore, the casing having apertures thcre- -in communicating with said seat. a plug rotatable in said bore and fitting snugly therein. a tapered portion on said plug testing upon said seat, the said'plug baring openings therein in said tapered portion adapted to aline with the apertures in sait casing. a threaded stem at the lower cm of said plug fitting in said recess. and means in connection with said plug for holdirig the latter against rotation.

3. In a locking valve. a casing llflb'iljgn bore extending inwardly from onle 1lsidithereof. a seat near the bottom of said ore. the said casing having a threaded recess at the bottom of said lmlc. axially aliucd with the latter. a plus; rotatable in said b re, a tapered portion ml said plug resting upon said seat, and a threaded stem at one end of said plug cngagcd in the said tIm-adcd recess.

in lcslimony signature.

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